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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 13 |
| 4 | 30 |
| 5 | 63 |
| 6 | 128 |
| 7 | 385 |
| 8 | 898 |
| 9 | 1923 |
| 10 | 3972 |
| 11 | 8069 |
| 12 | 16262 |
| 13 | 32647 |
| 14 | 65416 |
| 15 | 130953 |
| 16 | 262026 |
| 17 | 524171 |
| 18 | 1048460 |
| 19 | 2097037 |
| 20 | 4194190 |
| 21 | 8388495 |
| 22 | 16777104 |
| 23 | 33554321 |
| 24 | 67108754 |
| 25 | 134217619 |
| 26 | 268435348 |
| 27 | 536870805 |
| 28 | 1073741718 |
| 29 | 2147483543 |
| 30 | 4294967192 |
| 31 | 8589934489 |
| 32 | 17179869082 |
| 33 | 34359738267 |
| 34 | 68719476636 |
[1,4,13,30,63,128,385,898,1923,3972,8069,16262, 32647,65416,130953,262026,524171,1048460,2097037, 4194190,8388495,16777104,33554321,67108754, 134217619,268435348,536870805,1073741718, 2147483543,4294967192,8589934489,17179869082, 34359738267,68719476636] |